In order to solve the problem that the atomization effect of the dual nozzle in the roller shape equipment of the tobacco silk production line during the flavoring feeding process cannot be observed,an off-line calibration system for the atomization effect of dual nozzles was designed.The atomization operation of dual nozzles was simulated outside the roller shape equipment.The system consisted of a nozzle adjustment and positioning assembly,a steam and air pressure pipeline,a liquid flavoring delivery unit and an electric control unit installed on a moving trolley.The actual production conditions were simulated,reflecting the production process indicators such as nozzle spray distance and atomized spray radius in enclosed spaces.Therefore,it could provide quantified values of optimum spray angle and atomization for operators and maintenance staff.Under the premise of ensuring uniform atomization of dual nozzles,the system could control the opening time of each control valve and the gap adjustment of the nozzle in the external pipeline,study the relationship between the operating frequency of the perfuming feed pump motor and the feed liquid flow rate and rapid positioning after nozzle inspection and therefore satisfy the calibration requirements of the atomization effect of dual nozzles in different processes.The results show that:This system makes the nozzle atomization distance,atomization radius,effect particle size and other indicators in the closed unobservable space observable and measurable.The system can evenly atomize the liquid and eliminate the phenomenon that the nozzle drip produces wet mass,effectively reducing the amount of sticking of the flavoring feeding process.It plays an important role in the uniformity of material mixing in the process of stable flavoring.